光路自动准直快速调整数学模型研究

推演了用于计算机快速调整的巨型激光器光路自动准直控制数学模型,分析了ICF准直光路的光学特性及光路调整特点,据此求解出了准直控制的输入偏差量和输出控制量之间的数学模型.该模型在某大型激光装置的光路自动准直中得以实际应用,八路主放大级1～2程光路的准直时间＜3 min,3～4程光路的准直时间＜8 min,主放大级输出光束近场准直准确度优于0.3%,远场指向的准确度优于0.3″ RMS（均方根准确度）.     

合成条件对硅胶整体柱中孔结构的影响

硅胶整体柱是目前备受关注的液相色谱固定相。本文考察了合成条件对硅胶整体柱中孔结构的影响,包括反应体系的pH值、聚乙二醇(PEG)含量及分子量。实验表明,反应体系的pH值能有效地调控硅胶整体柱的中孔孔径及孔结构,当pH值为2或5时,整体柱中孔孔径较小;而当pH值为3或9时,孔径较大,孔结构趋于圆筒状。整体柱的中孔平均孔径随着PEG含量和分子量的增加而增加,其孔径分布也逐渐变宽。     

基于BDRM理论的深海声场快速预报研究

深海存在深海声道和双轴声道两种典型环境，WKBZ简正波方法已实现了深海声道中声场的快速准确预报，而对于双轴海洋声道则存在一定的误差。本文在WKBZ本征函数的基础上，推导出了参考界面相位修正的一致表达式，并将浅海声传播的波束位移射线简正波（BDRM）理论应用于计算双轴海洋声道中的声场，进行了数值模拟并与传统简正波方法进行比较，结果表明应用BDRM理论计算的传播损失具有很高的精度和速度。     

Feynman Identity: A Special Case Revisited

It is proved that a special case of Feynman identity is a consequence of the generalized Witt identity of some Lie algebra. Mathematics Subject Classifications (2000): 82B20, 05A19, 17B01.     

高功率激光脉冲光纤取样的实验研究

光纤取样可以降低高功率激光脉冲时间波形测量成本，并提高测量系统抗干扰能力。光纤耦合效率、信号保真度、信号获取率是采用光纤取样测量高功率激光脉冲时间波形的难点。针对大型高功率激光脉冲宽度窄、光束口径大以及输出光束远场漂移量大等特点，设计了一套激光脉冲光纤取样系统，在全口径取样和不降低信号保真度的条件下有效解决了测量系统信号获取率低下的问题，充分保证了测量系统的可靠性。     

A cDNA CLONE WITH ANTIONCOGENE ACTIVITY

A cDNA clone, p14--6, which has an antioncogene activity on the v--Ki--Ras oncogene-transformed malignant cell line DT, was found. This clone was recovered from the revertantR14 cells, which had been isolated by transfections of DT cells with a normal human fibro-blast cDNA library cloned in pcD2, an Okayama-Berg vector. When transfected into DT cells,p14--6 clone gave rise to phenotypical flat reversion in 5--15% of DT transfectant colo-nies. The p14--6--transfected flat cell line, RR, was proven to be a true revertant with signif-icantly reduced malignancy by in ritro and in riro malignancy tests. All other clones recov-ered from R14 cells were unable to cause this reversion. Molecular hybridizations showedthat the p14--6 was inserted into RR genome as tandem repeats, and no structural changewas found in the D--Ki--Ras oncogene in RR genome. These facts suggest that the antioncogeneactivity of the p14--6 clone on the DT cells may be exerted through expression of thecDNA contained in this clone. Possib     

高效液相苯胺甲基键合硅胶固定相的保留机理研究

 制备了 3种不同键合量的苯胺甲基键合硅胶固定相 ,分别在正、反相条件下研究了它们对芳烃及其极性、酸性、碱性取代衍生物的保留和分离选择性 ,探讨了该固定相的保留机理 ,并考察温度对溶质在具有不同键合量的固定相上保留的影响。结果表明 :苯胺甲基键合硅胶固定相对溶质的保留是疏水、π π、偶极 偶极和电荷转移等多种作用的结果 ,在反相模式中 ,疏水作用对溶质的保留起主要作用。     

溶胶-凝胶技术制备毛细管硅胶整体柱及其应用

采用溶胶-凝胶技术合成硅胶整体柱，研究了不同反应物配比对制备毛细管硅胶整体柱的影响，合成了具有高机械强度和化学稳定性的毛细管硅胶整体柱。通过十八烷基修饰得到反相固定相。考察了电渗流行为和电色谱性能。3种芳香胺和4种苯同系物可达到基线分离，柱效高达159000N／m。     

MNDO calculations on diazirines

The MNDO molecular orbital method gives good agreement between experimental geometries and, when available, heats of formation of diazirines. MNDO and ab initio calculations have been performed on a novel intermediate, methylenediazirine, proposed in a reaction of 3-chloro-3-methyl-diazirine. The relation of this intermediate to its diazo-isomer, its dimer and the products of the reaction are discussed on the basis of MNDO calculations.